LB11870

Ordering number : EN7256A LB11870 Monolithic Digital IC For Polygonal Mirror Motors Three-Phase Brushless Motor Driver http://onsemi.com Overview The LB11870 is a three-phase brushless motor driver developed for driving the motors used with the polygonal mirror in laser printers and plain paper copiers. It can implement, with a single IC chip, all the circuits required for polygonal mirror drive, including speed control and driver functions. The LB11870 can implement motor drive with minimal power loss due to its use of direct PWM drive. Functions Three-phase bipolar drive Direct PWM drive Includes six high and low side diodes on chip. Output current control circuit PLL speed control circuit Phase lock detection output (with masking function) Includes current limiter, thermal protection, rotor constraint protection, and low-voltage protection circuits on chip. Deceleration type switching circuit (free running or reverse torque) PWM oscillator Power saving circuit Semiconductor Components Industries, LLC, 2013 May, 2013 62707 MS IM B8-9164 / 80102 AS (OT) No.7256-1/14 LB11870 Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Supply voltage Output current Allowable power dissipation 1 Symbol VCC max IO max Pd max1 Conditions T ≤ 500ms *1 Independent IC Allowable power dissipation 2 Operating temperature Storage temperature Pd max2 Topr Tstg Mounted on a circuit board *2 Note *1: Be sure to perform derating from the standard value b...